Pylons would be my tool of choice for this type of project. I prefer both SQLAlchmeny and Mako to the Django equivalents anyway but, personal preference aside,

Pylons would be my tool of choice for this type of project. I prefer both SQLAlchmeny and Mako to the Django equivalents anyway but, personal preference aside, the fact that you have an existing data model and don't want something that "tries to do too much" make Django less desirable for this project.